Troubleshooting - STIEBEL ELTRON WWK 220 electronic Bedienung Und Installation

oPerATIoN

Troubleshooting

f Check the taps regularly. Limescale deposits at the tap out-
lets can be removed using commercially available descaling
agents.
f Regularly activate the safety valve to prevent it from beco-
ming blocked, e.g. by limescale deposits.
6. Troubleshooting
Note
At various points, reference is made to the appliance pa-
rameters. See chapter "Specification".
Fault Cause
No hot water is No power at the appliance. Check that the appliance is
available.
A fuse/MCB in the fuse box
has blown/tripped.
The appliance output data
are calculated according to
standard, using the intake
temperature specified in
the data table. Below this
temperature the applian-
ce efficiency and output
decrease. The heat-up time
is extended.
The safety valve The appliance cylinder is
of the DHW at mains water pressure.
cylinder is drip- During heat-up, expansion
ping. water may drip from the
safety valve.
The condensate The surface temperature
drain drips. of the evaporator is lower
than the dew point tempe-
rature of the ambient air.
Condensate forms.
The room tem- operation of the appliance
perature drops. can cause the room tempe-
rature to fall by 1 to 3 °C,
as the appliance extracts
energy from the air.
High power The lower the intake tem-
consumption perature, the lower the
heat pump efficiency.
Service/fault See the „Fault codes"
symbol is per- chapter.
manently on.
Service/fault See the „Fault codes"
symbol flashes chapter.
and the water
does not heat
up.
Defrost symbol The appliance is in defrost
is shown. mode.
46 | WWK 220-300 electronic
remedy
connected to the power supply.
Check whether the fuses/MCBs
in your fuse box have blown/
tripped. If required, disconnect
the appliance from the power
supply and replace the fuses/
reset the MCBs. Contact your
qualified contractor if the fuse/
MCB blows/trips again after the
appliance is re-connected to the
power supply.
No action required.
Notify a qualified contractor if
water continues to drip when
heat-up has been completed.
The amount of condensate de-
pends on the humidity level of
the ambient air.
If the room temperature falls
by more than 5 °C, check the
room size (see the "Specifi-
cation / Data table" chapter).
Supplying energy by opening
a door to another room will
remedy this.
Where possible, avoid high set
temperatures and the use of
rapid heat-up.
Notify a qualified contractor. A
permanently lit "service/fault"
symbol indicates that a fault has
occurred, but the heat pump is
heating nevertheless.
It is imperative that you notify a
qualified contractor quickly. A
flashing "service/fault" symbol
indicates that a fault has oc-
curred and the heat pump is no
longer heating.
No action required.
Fault Cause
The heat pump There is a heat demand,
symbol is flas- but the compressor is lo-
hing. cked out.
The electric A temperature controller
emergency/ has switched off the elec-
booster heater tric emergency/booster he-
symbol is flas- ater during rapid heat-up.
hing.
The electric The electric emergency/
emergency/ booster heater lights up
booster heater when there is a demand.
symbol is illu- The internal controller of
minated but the the electric emergency/
electric emer- booster heater may have
gency/booster ended electric heating. A
heater is not possible cause may be a
operational. fault in the electric emer-
gency/booster heater. A
possible cause may be that
the high limit safety cut-
out has responded.
Fault code
You can call up a fault code if the Service/fault symbol is flashing
or continuously lit on the display.
Keep pressing "Menu" until the fault code
appears.
Fault description
2 perma- The sensor at the cylinder top is
nently faulty. The actual temperature
on display switches from the cylin-
der top sensor to the integral
sensor. The appliance continues
to heat without any loss of com-
fort. The mixed water volume
cannot be calculated and is dis-
played as "- -".
4 perma- The integral sensor is faulty.
nently In the event of a faulty integral
on sensor, the integral sensor is
set to the value of the sensor at
the cylinder top, and amount of
mixed water is calculated using
this value. The appliance conti-
nues to heat with a reduced start
hysteresis.
A mixed water volume is still cal-
culated, based on the assumption
that the cylinder top temperature
is reached throughout the DHW
cylinder.
remedy
No action required. The com-
pressor restarts automatically
after the compressor lockout
time has elapsed. The symbol
stops flashing automatically.
No action required. The ap-
pliance continues the quick
heat-up process using the heat
pump. The symbol stops flas-
hing when the controller re-en-
ables the electric emergency/
booster heater. The symbol
goes out when the temperature
throughout the DHW cylinder
reaches the set rapid heat-up
temperature.
Have a qualified contractor
check whether the controller of
the electric emergency/boos-
ter heater is set correctly. The
controller must be turned fully
anti-clockwise. Have a qualified
contractor check the high limit
safety cut-out.
remedy
Notify a qualified cont-
ractor.
Notify a qualified cont-
ractor.
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